<?php
  function daddslashes($string) {
    if(is_array($string)) {
     foreach($string as $key => $val) {
      $string[$key] = daddslashes($val);
      }
     }else{
      $string = addslashes($string);
      }
     return $string;
    }
function real_ip(){
    $ip = $_SERVER['REMOTE_ADDR'];
    if(isset($_SERVER['HTTP_X_FORWARDED_FOR']) && preg_match_all('#\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}#s', $_SERVER['HTTP_X_FORWARDED_FOR'], $matches)) {
        foreach ($matches[0] AS $xip) {
            if (!preg_match('#^(10|172\.16|192\.168)\.#', $xip)) {
                $ip = $xip;
                break;
            }
        }
    } elseif (isset($_SERVER['HTTP_CLIENT_IP']) && preg_match('/^([0-9]{1,3}\.){3}[0-9]{1,3}$/', $_SERVER['HTTP_CLIENT_IP'])) {
        $ip = $_SERVER['HTTP_CLIENT_IP'];
    } elseif (isset($_SERVER['HTTP_CF_CONNECTING_IP']) && preg_match('/^([0-9]{1,3}\.){3}[0-9]{1,3}$/', $_SERVER['HTTP_CF_CONNECTING_IP'])) {
        $ip = $_SERVER['HTTP_CF_CONNECTING_IP'];
    } elseif (isset($_SERVER['HTTP_X_REAL_IP']) && preg_match('/^([0-9]{1,3}\.){3}[0-9]{1,3}$/', $_SERVER['HTTP_X_REAL_IP'])) {
        $ip = $_SERVER['HTTP_X_REAL_IP'];
    }
    return $ip;
}

function getRand($proArr,$sum) { //计算中奖概率
    $rs = ''; //z中奖结果
    $proSum = $sum; //概率数组的总概率精度
    //概率数组循环
    foreach ($proArr as $key => $proCur) {
        $randNum = mt_rand(1, $proSum);
        if ($randNum <= $proCur) {
            $rs = $key;
            break;
        } else {
            $proSum -= $proCur;
        }
    }
    unset($proArr);
    return $rs;
}
function get_ip_city($ip)
{
    $url = 'http://ip.taobao.com/outGetIpInfo?ip='.$ip.'&accessKey=alibaba-inc';
    $data = file_get_contents($url);
    $arr = json_decode($data, true);
    if (array_key_exists('code',$arr) && $arr['code']==0) {
        if ($arr['data']['city']) {
            $location = $arr['data']['region'].$arr['data']['city'];
        } else {
            $location = $arr['data']['region'];
        }
    }
    if($location){
        return $location;
    }else{
        return false;
    }
}
function authcode($string, $operation = 'DECODE', $key = '', $expiry = 0) {  
    $ckey_length = 4;  
    $key = md5($key ? $key : $GLOBALS['discuz_auth_key']);  
    $keya = md5(substr($key, 0, 16));  
    $keyb = md5(substr($key, 16, 16));  
    $keyc = $ckey_length ? ($operation == 'DECODE' ? substr($string, 0, $ckey_length): 
 substr(md5(microtime()), -$ckey_length)) : '';  
    $cryptkey = $keya.md5($keya.$keyc);  
    $key_length = strlen($cryptkey);  
    $string = $operation == 'DECODE' ? base64_decode(substr($string, $ckey_length)) : 
 sprintf('%010d', $expiry ? $expiry + time() : 0).substr(md5($string.$keyb), 0, 16).$string;  
    $string_length = strlen($string);  
    $result = '';  
    $box = range(0, 255);  
    $rndkey = array();
    for($i = 0; $i <= 255; $i++) {  
      $rndkey[$i] = ord($cryptkey[$i % $key_length]);  
    } 
    for($j = $i = 0; $i < 256; $i++) {  
      $j = ($j + $box[$i] + $rndkey[$i]) % 256;  
      $tmp = $box[$i];  
      $box[$i] = $box[$j];  
      $box[$j] = $tmp;  
    }  
    for($a = $j = $i = 0; $i < $string_length; $i++) {  
      $a = ($a + 1) % 256;  
      $j = ($j + $box[$a]) % 256;  
      $tmp = $box[$a];  
      $box[$a] = $box[$j];  
      $box[$j] = $tmp;  
      $result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256]));  
    }  
    if($operation == 'DECODE') {  
      if((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) && 
 substr($result, 10, 16) == substr(md5(substr($result, 26).$keyb), 0, 16)) {  
        return substr($result, 26);  
      } else {  
        return '';  
      }  
    } else { 
      return $keyc.str_replace('=', '', base64_encode($result));  
    }  
  }
